TW201136215A - Traffic-to-pilot ratio estimation for MIMO-OFDM system - Google Patents

Abstract

A method for estimating a traffic-to-pilot ratio (TPR) for a received signal is disclosed. The received signal is despatialized to obtain a despatialized received signal. A channel matrix is despatialized to obtain a despatialized channel matrix. The despatialized received signal is whitened to obtain a pre-whitened despatialized received signal. The despatialized channel matrix is whitened to obtain a pre-whitened despatialized channel matrix. The estimated TPR for the received signal is determined using the pre-whitened despatialized received signal and one or more pre-whitened despatialized channel estimation coefficients.

Description

201136215 VI. INSTRUCTIONS: PRIORITY STATEMENT This case is related to and requests the application for the application on April 29, 2009.

Priority is entitled "Traffic-to-pilot ratio estimation for MIMO-OFDM system", U.S. Provisional Patent Application Serial No. 61/173,696, which is incorporated herein by reference. TECHNICAL FIELD OF THE INVENTION The present invention generally relates to communication systems. More particularly, the present invention relates to systems and methods for traffic pilot frequency ratio estimation for MIMO-OFDM systems. [Prior Art] A wireless communication system has been widely used to provide various types of communication contents such as voice, video, and materials. The systems may be multiplex access systems capable of supporting multiple terminals to communicate with one or more base stations simultaneously. As used herein, the term "mobile device" refers to an electronic device that can be used for voice and/or data communication over a wireless communication network. Examples of mobile devices include cellular phones, personal digital assistants (PDAs), handheld devices, wireless data devices, laptops, personal computers, and the like. Alternatively, the mobile device may also be referred to as an access terminal, a mobile terminal, a subscriber station, a mobile station, a remote station, a user terminal, a terminal, a subscriber unit, a user device, and the like. A wireless communication network can provide communication for a number of mobile devices, each of which can be served by a base station. Alternatively, the base station may also be referred to as an access point, a point B, or some other terminology. 4 201136215

A mobile device may be required to estimate the traffic-to-pilot ratio (TPR) of the key functions of the mobile device. For example, the mobile device can estimate the TPR for calculation of linear minimum mean square error (LMMSE) equalizer coefficients, for high-order cluster demodulation, or for log-probability ratio (LLR) calculations. The conventional TPR estimation algorithm uses the original received signal. Utilizing pre-whitened received signals and active channels may increase the performance of the TPR estimate, especially when there is a significant correlation between multiple receive antennas. SUMMARY OF THE INVENTION This case reveals _____ copying independent items. [Embodiment] The present invention describes a method of estimating a traffic pilot frequency ratio (TpR) of a received signal. The received signal is de-spaced to obtain a de-spaced received signal. The channel matrix is de-spaced to obtain a de-spaced channel matrix. The de-spaced received signal is whitened to obtain a pre-whitened de-spaced received signal. The de-spaced channel matrix is whitened to obtain a pre-whitened de-spaced channel matrix. The estimated TPR of the received signal is determined using a pre-whitened de-spaced received signal and one or more pre-whitened de-spaced channel estimation coefficients. Determining the estimated TPR of the received signal may include estimating the traffic energy of the pre-whitened de-spaced received signal. The guiding frequency energy of the de-spatialized channel matrix of J. The estimated TPR can be determined by using the traffic energy of the estimated leaf of ^ 4(7) and the estimated pilot energy of s ten. 201136215 Estimating the traffic can directly include determining the total received energy "can determine the noise component of the total received energy. The traffic energy estimate can be determined using the total received energy and the noise component of the total received energy. A decision traffic energy estimate can be performed for each subframe. " Estimating traffic energy may include decoding a physical downlink control channel (PDCCH). It is also possible to determine the resource block (rb) allocation. The task of estimating traffic energy can be established. The selected symbol can be read from the tone random access memory (RAM). The selected symbol can be processed with a whitezer to obtain a pre-whitened symbol. The pre-whitened character can be used to estimate the energy of the traffic. Estimating the pilot energy can include multiplying the channel matrix by a precoding matrix to obtain a de-spaced channel matrix. The de-spaced channel matrix can be multiplied by a whitening matrix to obtain a pre-whitened de-spaced channel matrix. The pre-whitened de-spaced channel matrix can be used to determine the pilot energy estimate. A decision pilot energy estimate can be performed for each subframe. Estimating the pilot energy may include decoding the physical downlink control channel (PDCCH). The precoding matrix can be determined. A task can be established to estimate the pilot frequency. The estimated channel matrix can be multiplied by the precoding matrix and multiplied by 1 • Gathered to whiten the matrix ' to produce a pre-whitened effective channel moment. The pre-whitened effective channel matrix can be used to estimate the pilot frequency energy. The car can be the estimated channel matrix. This method can be performed using a mobile device. Blush 4 ^ _ This tilting device can be configured to operate in a multiple input multiple output (ΜΙΜΟ) orthogonal frequency division multiplexing (〇fdm) system. The B-month also p, +, and Tian Yan have a wireless device configured to estimate the traffic steering frequency ratio (TPR) of the received signal 6 201136215. The wireless device includes a processor, a memory for electronic communication with the processor, and instructions stored in the memory. The dedicated instruction is executable by the processor to de-space the received signal to obtain a de-spaced received signal. The instructions may also be executed by the processor to de-space the channel matrix to obtain a de-spaced channel matrix. The instructions are further executable by the processor to whiten the de-spaced received signal to obtain a pre-whitened de-spaced received signal. The instructions may also be executed by the processor to whiten the de-spaced channel matrix to obtain a pre-whitened de-spaced channel matrix. The instructions are further executable by the processor to determine the estimated TPR of the received signal using the pre-whitened de-spaced received signal and one or more pre-whitened de-spaced channel estimation coefficients. The present invention describes a wireless device configured to estimate a traffic pilot frequency tb (TPR) of a received signal. The wireless device includes means for de-spatializing the received signal to obtain a de-spaced received signal. The wireless device also includes means for de-spatializing the channel matrix to obtain a de-spaced channel matrix. The wireless device further includes means for whitening the de-spaced received signal to obtain a pre-whitened de-spaced receive L number. The wireless device also includes means for whitening the de-spaced channel matrix to obtain a pre-whitened de-spaced channel matrix. The wireless device further includes means for determining an estimated TpR of the received signal using the pre-whitened de-spaced received signal and one or more pre-whitened de-spatialized channel estimation coefficients. The present invention also describes a traffic pilot frequency ratio 201136215 for estimating received signals (ΤΡΙΟ@电脑程序产品. The computer program product includes computer readable media having instructions thereon. The instructions include for receiving signals Deblocking to obtain a code for de-spaced received signals. The instructions also include code for de-spatializing the channel matrix to obtain a de-spaced channel matrix. The instructions are further included for The code m for whitening the de-spaced received signal to obtain a pre-whitened de-spaced received signal also includes a de-spaced channel matrix for whitening the de-spaced channel matrix to obtain a pre-whitened The instructions further include code for determining an estimated TPR for receiving the ## using the pre-whitened de-spaced received signal and one or more pre-whitened de-spaced channel estimation coefficients. A wireless communication system of a plurality of wireless devices. The wireless device may be a base station 102, a mobile device 104, etc. The base station 102 is associated with one or more The station that the mobile device 104 is communicating with. The base station 102 may also be referred to as an access point, a broadcast transmitter, a defect B, an evolved Node B, etc. and may include an access point, a broadcast transmitter, a Node B, and an evolved Node B. Some or all of the functions, etc. Each base station provides a communication coverage for a specific geographic area. The term "cell service area" may refer to a base station and/or its coverage area, depending on the context in which the term is used. It may be referred to as a terminal, an access terminal, a User Equipment (UE), a subscriber unit, a station, etc. and may include some or all of the functions of a terminal, an access terminal, a User Equipment (UE), a subscriber unit, a station, etc. The device 104 can be a cellular phone, a personal digital assistant (PDA), a wireless device, a wireless data device, a handheld device, a laptop computer, etc. The mobile device 201136215 can be used at any given time in the downlink mode ((10) and/or Or communicating with zero, one or more bases (1) on the uplink (UL) 106. The (4) way 1G8 (or forward link) represents the pass from the base station 102 to the mobile device 1〇4. The link, while the uplink 1〇6 (or reverse link) represents the communication link from the mobile device 104 to the base station 1〇2. The wireless communication system can be capable of sharing the available system resources (eg, frequency Wide and transmit power) to support multiplexed access lines for communication with multiple users. Examples of multiple access systems (4) include code division multiplex access (CDMA) systems, time-division multiplex access (tdma) System frequency division multiplexing access (FDMA) system, orthogonal frequency division multiplexing access (〇dfd) system, and subspace multiple 1 access (SDMA) system. In one configuration, the wireless communication system can be positive Crossover frequency jade (10)dm) system. Wireless communication system can use MIM〇. The term “multiple input multiple output” (M! MG) stands for multiple antennas at the transmitter and receiver to improve communication efficiency. At the transmitter, various portions of the data stream can be transmitted from different antennas. At the receiver, different portions of the data stream can be received by different antennas and then combined. The terms "data flow" and "layer" are used interchangeably herein. The communication between the mobile device 1G4 and the base station 1() 2 in the _ (eg, multiplex access) can be performed via the transmission on the wireless link consisting of the forward link and the reverse link. The input single output (siso), multiple input single output (MIS〇), or multiple input multiple output (ΜΙΜΟ) system establishes the communication key. The MIMQ system includes multiple (Μτ) transmit antennas and multiple (Mr) The transmitter and receiver of the receiving antenna 201136215 for data transmission. The SISO and MISO systems are special examples of the system. If other dimensions established by multiple transmitting and receiving antennas are used, the system can provide improvements. Performance (eg, higher throughput, greater capacity, or improved reliability) The mobile device 104 can include a traffic steering frequency ratio (TPR) estimation module 110. The mobile device 104 can use traffic pilot frequencies The TPR is estimated by the TPR estimation module 110. Some key functions of the mobile device 104 require a TPR. The TPR may be necessary to calculate a linear minimum mean square error (LMMSE) equalizer coefficient. TPR may also be necessary for high-order clustering (eg, 16 Quadrature Amplitude Modulation (QAM) and 64-QAM) demodulation. TPR may also be necessary to calculate the Logarithmic Probability Ratio (LLR). LLR can be used for Turbo decoding. Table 1 below summarizes with, for example, the Physical Downlink Shared Channel (PDSCH), the Physical Downlink Control Channel (PDCCH), the Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH), the Physical Broadcast Channel (PBCH), and The TPR-related coding, modulation, and chirp transmission modes of all physical downlink channels, such as the Entity Control Format Indicator Channel (PCFICH). The PDSCH is closely related to the TPR of LMMSE, QAM, and LLR. Therefore, the PDSCH may need to be estimated. TPR. This mode may include

Spatial multiplex b Space Frequency Block Coding (SFBC) ΜΙΜΟ. Downlink channel coding modulation ΜΙΜΟ Mode power control TPR for UE affects PDSCH Turbo QPSK, 1 space is mostly LMMSE 10 201136215 6-QAM, 64-QAM, SFBC, QAM, L LR PDCCH Cyclotron QPSK SFBC is LMMSE, LLR [ LLR bit width] PHICH (3,1) Repeat BSKP SFBC is LMMSE PBCH Cyclotron QPSK SFBC Hope TPR is close to OdB LMMSE, LLR [LLR bit width] PCFICH (32,2) Block QPSK SFBC Hope TPR is close to OdB LMMSE Table 1 Since the PDSCH has a TPR impact on LMMSE, QAM, and LLR, the PDSCH may need to estimate the TPR. For each mobile device 104,

In a PDSCH resource element (RE) that does not include a reference signal (RS) in all OFDM symbols, the ratio of PDSCH to RS per resource element energy (EPRE) may be equal and may be represented by 〜. For each mobile device 104,

In PDSCH REs including RSs in all OFDM symbols, the ratio of PDSCH to RS EPRE may be equal and may be represented by 屻. Can use higher layers

The Pb/ signal indicates the specific ratio/heart of the cell service area. 11 201136215 FIG. 2 is a block diagram illustrating a UE 204 for use with the present systems and methods. The UE 204 of FIG. 2 may be one configuration of the mobile device 1〇4 of FIG. UE 204 may include a ratio 212 of PDSCH to RS EPRE. UE 204 may include a reference signal (RS) 216. RS 216 may also be referred to as a pilot frequency signal. The UE 204 may also include a receive signal 2 1 8 . The received signal 2 1 8 can be expressed as where A: is the tone index inside the OFDM symbol and / is the OFDM symbol index inside the subframe. The UE 204 can include an estimated channel matrix 220. The traffic steering frequency ratio estimation module 210 can generate a traffic steering frequency ratio estimate 222 using the received signal 21 8 and the estimated channel matrix 220. The traffic guidance frequency ratio estimation module 210 of FIG. 2 may be a configuration of the traffic guidance frequency ratio estimation module 图 of FIG. FIG. 3 is a block diagram showing the traffic guidance frequency ratio estimation module 31A. The traffic guidance frequency ratio estimation module 3 10 of FIG. 3 may be one configuration of the traffic guidance frequency ratio estimation module 110 of FIG. The traffic steering frequency ratio estimation module 31 can estimate the traffic steering frequency ratio 348 using the received signal 3 1 8 3; and the channel matrix 324 ugly. 'A traffic energy estimate can be performed for each subframe. For the first subcarrier and the /th 〇FDM symbol inside the sub-frame, equation (1) can be used to represent the channel model: y[k, I] = ^H[k, l]P[k, /&gt ;[Α:3 /] + V[k, l] =IK /] + V[k, l] . (1) In equation (1), the shape /] is the emission signal of Zxl, where £(啦'/> [A:, /])-/, claw, η is the received signal 318 of %χ1, and _, /] is a Αχ1 noise vector with a correlation vector.孖[Free, /] is the channel matrix 324, the household [怂/] is [the precoding matrix, and the ugly team ^ is 12 201136215 乂 ^ effective channel matrix 330. Equation (2) can be used to define five s: when (Α:, /) € Φβ. (2) In equation (2), the heart is a collection of index pairs (moxibus, /) of resource elements with traffic steering frequency ratios. In equation (2), φβ is a set of index pairs of resource elements having a traffic pilot ratio. It can be represented by a higher εβ/=Ρβ/ layer/foot 4 7Pa 〇 In the configuration, 'the original received signal is less [mox, /] 3 1 8 can be pre-whitened and then used for traffic energy estimation. The whitezer 332 can be used to pre-whiten the original received k number. In one configuration, the de-spatializer 326 may be used to de-space the original received apostrophe 3 1 8 prior to whitening of the white 332 to obtain a de-spaced received signal 328. The de-spaced received signal 328 may also be referred to as an active receive signal. The rounding of the whitezer 332 may be referred to as a pre-whitened de-spaced received signal (less pw) 334 providing a pre-whitened de-spaced received signal 334 in equation (3): ypwn L^j »] = Rnn /] (3 =^Rnn2^eff[k,l]s[kJ] + R^\k,l] =7^_[^:,/] shape/] +

O In equation (3), C1/2 county white external potential Μ 疋 疋 whitezer 3 3 2 used 8 r χ 8 r whitening η \k, n pre-whitened de-spaced receive signal 334,

Hp.n[k, lU Nr, L^'s ambiguous noise vector, and ώ pre-whitened de-spaced channel matrix 336. In Equation (4), the total received energy 13 (4) 201136215 (including signal and interference) obtained by summing the resources 7L is provided in the equation: ypwn ^]|| ΤΛ= Σ Nf!\ypWn[ kJ,qf= Σ

ΜβΦΑ q^O (k,l)^A τβ= Σ Σ (Α:, /)εΦ5 q " In equation (4), _ypvv/l[A:, /, minute] is the "receiving antenna" Pre-whitening symbol at the place. Similar to equation (4), the total received energy obtained by adding all the resource elements in the pair is given in equation (5): 5) \^Φ^ηίΚΙ][ ^ to directly derive equation (6): ^VA\^pw„[k,l]) = (ugly, team/] shape/]5[moxibustion, /])] + Σ+如,_,/])] (ΚΙ)^φα =Εα(„ (&, (k9l)e〇A /J ( 6 ) Έυ (ί,/)εΦΑ =%,1^[卜,["]+|φΐ In equation (4), W is the φ tin base. Equation (7): ^(Tb ^pwn [^> ^]) = 2] 〇(7) Then we can use the formula f R, #人+ i π with the search C8) Τβ of the equation (5): ΤΑ and Γ = 7Ά. Combine equation (6), equation (7), and etc. (8) (9): 弋(8) to obtain the equation (* , /)εΦ5 201136215 ^Kn[k,i^EA Σ [κη[^/]||:] {kJ)e0A L ” +'base',,/]||;]+shirt+M ( 9) = Em + Em In equation (9), the traffic component Ew + (ίο) can be defined using equation (10). In equation (9), the noise component Ε» can be defined using equation (11). 11) ~ New drink (Ιφ"+|φβ|). Ideally the estimate of ' E w * would be Τ - E «. However, when the total interference

Larger, or when there are not enough tones to average, the estimator TE "will produce an invalid negative value. This problem can be solved by using equation (12) to set the traffic energy estimate from the traffic energy estimator 338. Left 黯 342 to solve:

T noise, (12) The pilot energy estimator 340 can be utilized to estimate the pilot frequency energy 344 using the pre-whitened active channel matrix 336. The pilot frequency energy 344 can be estimated for each subframe. The estimated channel matrix 324 obtained from the channel estimator is provided in the equation (13) for the moxibustion subcarrier and the _M symbol ' inside the sub-frame: /, + / / /). ~ (13) In Equation U3), _ represents the channel estimation error matrix. It can be false 15 201136215 There is a zero mean ' and it is independent of the actual channel view /]. It is possible to use the precoding matrix in the de-spacer 326 channel matrix 324 no # equation (13) estimation Η, j to the two-interval estimation channel I-imported estimation channel matrix 33g can also be called the first two materials After 1 , the de-spaced estimated pass-to-array 330 is whitened by the whitezer 332 to obtain a pre-whitened de-spaced talker channel P 336. Pre-whitening de-spaced estimation channel matrix states can also be referred to as pre-whitening effective channel moments m using equation (14) to represent pre-whitening, de-spaced estimation channel matrix 336:

Hpwn[k,l] - R^/2H[k,l]P[k] =Ke and 1/2·, / just M:2%, / just) = ^{Hpwn[k,l] + Hpwn [k,I]) ( 14 ) 引导You can use the equation (15) to represent the pilot energy estimate 344 : Ρ = . Σ.. Hmn[kJ] (15) Show the pilot energy estimate in equation (16) The average value of the condition of the channel matrix 3 24 //[&, /]: :3⁄4 Σ (Α,ΟεΦ^υΦ^ When the estimation error of the channel is small enough, the deviation of the equation (16) can be ignored and then |2 The equation (15 can be used as the estimator of (8)_5U~l 丨丨-" _ then the traffic pilot frequency ratio (TPR) calculator 346 can be used to determine the traffic pilot frequency ratio estimate A 348. The TPR calculator 346 can be slaved to the traffic. The energy estimate 201136215 3:38 receives the above equation (〇's traffic energy estimate 342 and can receive the pilot frequency of equation (15) above from the pilot frequency energy estimator 34〇

/V can estimate p 344. The traffic pilot frequency ratio estimate 348 can be determined using one or more coefficients of the traffic energy estimate 342 and the pilot energy estimate 344. The traffic pilot frequency ratio estimate 348 can be calculated using equation (17): Ρ = ^β- Hey. (17) Equation 17 can represent a mixture of hearts and sums. The final estimate of the heart and heart of the traffic pilot frequency ratio 348 is provided in equation (18):

Pa = P-Ca Bu cb. r 1R, the coefficients Ca and cB can be calculated using equation (19): CA=~~~!__ α + (1-α)^·

Pa

Pb (19) CB =--^- a + (\-a)^-Pa As described above with reference to Figure 1, the higher ratio can be used to signal b Pb / , ,, cell service area specific ratio /Αί. The equation α (2〇) can be used to derive the variable α: a |φ^|Ν+ΚΪ (20)

4 is a flow chart illustrating a method 400 for estimating a traffic steering frequency ratio (TPR) 222 of a received signal 218. The method 400 can be performed using the mobile device 1 〇4. In one configuration, the mobile device 1〇4 may be UE 17 201136215 204. The mobile device 104 can de-spatialize the received signal 218 (402). The mobile device 丨〇4 can also de-space (404) the channel matrix 22〇. The channel matrix 22〇 can be an estimated channel matrix. In one configuration, the received signal 218 and the channel matrix 22A can be stored in memory prior to de-spatialization. Alternatively, receive signal 218 and channel matrix 22A may be de-spaced continuously during reception. The mobile device 1〇4 can then whiten the de-spaced received signal 328 (406). The mobile device 1〇4 can also whiten (4〇8) the de-spaced channel matrix 330. Next, the mobile device 1〇4 estimates the traffic energy 342 of the pre-whitened de-spaced received signal 334 (410). The mobile device 104 can also estimate (412) the pilot frequency energy 344 of the pre-whitened de-spaced channel matrix 336. In one configuration, the mobile device 104 can simultaneously evaluate the traffic energy 342 and the pilot energy 344 (412). Once the mobile device 342 has estimated the traffic energy 342 and the pilot frequency energy 344, the mobile device ι4 can determine the traffic steering frequency ratio (TPR) 348 of the received signal 218 (414). The traffic pilot frequency ratio 348 can be an estimate. The method described above with respect to FIG. 4 can be performed using various hardware and/or software components and/or modules corresponding to the functional blocks 5 of FIG. 5, in other words, block 402 shown in FIG. Block 414 corresponds to means function block 502 to means function block 514 shown in FIG. 6 is a flow diagram illustrating a method 600 of determining a traffic energy estimate 342. The mobile device 104 can determine the total received energy (6〇2). The mobile device 104 can also determine the noise component (604) in the total received energy. Then, the mobile device 104 can determine the traffic energy estimate 342 ( 606 ) using the total received energy and the noise component of the total received energy. The method 600 described above with respect to FIG. 6 may be performed using various hardware and/or software components and/or modules corresponding to the means of function blocks 700 illustrated in FIG. In other words, blocks 602 through 606 shown in FIG. 6 correspond to means function block 702 to means function block 706 shown in FIG. FIG. 8 is a flow chart illustrating another method 800 of determining a traffic energy estimate 342. The mobile device 104 can decode (802) a physical downlink control channel (PDCCH). The mobile device 1〇4 can then decode the RB allocation (804). Next, a digital signal processor (DSP) can establish a task for the energy estimation of the energy (806). The mobile device 104 can read the selected symbol (8〇8) from the tone RAM. The mobile device 1〇4 can process the selected symbol using the whitezer 332 (81〇). The mobile device 104 can utilize the pre-whitened symbols to estimate the energy of the traffic (812). A baseline selection rule can be defined to use all available OFDM symbols for traffic energy estimation. To reduce complexity, you can use simplified selection rules. A simplified selection rule is illustrated in Table 2 below. In Table 2, cp represents the number of RBs allocated by the cyclic prefix OFDM symbol index (normal CP) OFDM symbol index (extended CP) type 110-56 3 4 based on time slot 55-28 3,10 4,10 based on sub- Frame 19 201136215 27-14 3,5,10,12 4,5,10,11 Based on subframe 13~7 3,5,6,10,12,1 3 3,4,5,9,1〇 , 11 Based on the sub-frames 6~1 All available available sub-frames according to Table 2 The simplified selection rules of Table 2 can significantly reduce the number of resource elements used for traffic energy estimation. This is due to the use of up to 110 (RB) xl (Symb) xl2 (Tone) = l320 tones. The method 800 described above with respect to FIG. 8 can be performed using various hardware and/or software components and/or modules corresponding to the functional blocks 9 of FIG. In other words, blocks 802 through 812 shown in FIG. 8 correspond to means function block 902 to means function block 9丨2 shown in FIG. Figure 1 is a block diagram showing an estimate of the pilot energy of 1 〇〇〇. The channel matrix (//) 1024 can be multiplied by the precoding matrix ι〇5〇 to obtain the de-spaced channel matrix (7/e//) 1 030. The de-spaced channel matrix 1030 can then be multiplied by the whitening matrix 1052 to obtain a pre-whitened de-spaced channel matrix 1036. Then, the pre-whitened de-spaced channel matrix 1036 can be used to determine the pilot frequency energy estimate 1〇44 (1〇54). Figure π is a flow chart illustrating another method 11 for piloting frequency energy estimation. The mobile device 104 can decode the physical downlink control channel (PDCCH) (11G2) e mobile device 1() 4 can then determine the precoding matrix deletion (1104). The DSP can establish a task of pilot energy estimation (1106). For the selected resource element of the group, the channel matrix 1024 of the estimated 2011201115 may be multiplied by the precoding matrix 1050 and multiplied by the whitening matrix 1052 (1108) to produce a pre-whitened de-spaced channel matrix 1〇36. The mobile device 104 can then estimate the pilot frequency energy using the pre-whitened de-spaced channel matrix 1036 (1110). To reduce complexity, symbol selection rules and tone selection rules can be utilized to select resource elements for pilot frequency energy estimation. In the symbol selection rule, 'if the traffic energy estimate is based on the sub-frame, the channel estimation result after the infinite impulse response (IIR) filtering but before the time domain interpolation can be used for the two slots. The set of channel estimates may correspond to a time slot within the time slot (after group delay compensation). The set of channel estimates may also cover all subcarriers in the frequency domain. In the symbol selection rule, if the traffic energy estimate is based on time slots, then only after the IIR filtering is used in the first time slot, but only The channel estimation result before the domain interpolation. In the tone selection rule, only two tones in the resource blocks assigned to the mobile device 104 are used. In one configuration, it is possible to select pitch 音 and pitch 6 as the pitch used. The symbol selection rule and pitch selection rules can significantly reduce the number of resource elements used to guide the frequency energy estimation. For example, only 110 (RB) x 1 (Symb) x 2 (Tone) = 220 channel matrices can be used. These selection rules are used for two reasons. First, noise may have been adequately suppressed in the estimates of these channels. Therefore, it may not be necessary to average on a large number of resource elements in order to process the gain. Second, the selected resource elements may have captured channel variations in the time and frequency domains well. The method 11 以上 described above may be performed using various 21 201136215 hardware and/or software components and/or modules corresponding to the means of function blocks 12 图 shown in FIG. In other words, the blocks 1102 to 1110 shown in Fig. 11 correspond to the means function block 12〇2 to the means function block 121A shown in Fig. 12. Figure 13 is a block diagram of the transmitter system 131A and the receiver system 1 3 50 in the UI system 13A. In one configuration, the base station can be utilized to implement the transmitter system 131, and the mobile device can be utilized to implement the receiver system 1 3 50 » or the mobile device can be implemented using the mobile device 1310 ' and can utilize the base station Implement the receiver system. At the transmitter system 1310, a plurality of data streams of traffic data can be provided from the data source 1312 to the transmitting (τχ) data processor 1314. In this configuration, individual data streams can be transmitted on their respective transmit antennas. The τ data processor 1314 can format, encode, and interleave the traffic data for the data stream based on a particular encoding scheme selected for each data stream to provide encoded data. The OFDM technology can be used to multiplex the encoded data of each data stream with the pilot frequency data. The pilot data is typically a known data pattern that is processed in a known manner and can be used at the receiver system to estimate channel response. H ' may be based on a particular modulation scheme selected for each data stream (eg, Quadrature Phase Shift Keying (QpSK), Eight Phase Phase Shift Keying (8PSK), 16 Quadrature Amplitude Modulation (16QAM), 64qam) pairs The multiplexed pilot and encoded data of the data stream is tuned "that is, symbol mapped" to provide modulation symbols. The instructions executed by the processor can determine the stream rate and encoding of each stream. And modulation. Then all modulation streams of the data stream can be provided to the TX mimo 22 201136215 processor 1320, which can further process the modulation symbols (eg, for OFDM). Then, the τ MIMO processor 132 is directed to the transmitter ( The TMTR) 1322a to the transmitter 1322t provides % modulation symbols. In some configurations, the ΜΙΜΟ processor 1320 can apply beamforming weights to the symbols of the data stream and to the antenna on which the symbol is being transmitted. Each transmitter 1322 can receive And processing respective symbol streams to provide one or more analog signals, and further adjusting (eg, amplifying, filtering, and upconverting) the analog signals to A modulated signal suitable for transmission over the μιμ channel is provided. The modulated signals from the transmitter to the transmitter 1322t can then be transmitted from the antennas 1324& to the antenna 1324t, respectively. At the receiver system 1350, the transmitted The modulated signal can be received by the % antenna 1352a to the antenna I352r, and the received signals from the respective antennas 1352 can be provided to the respective receivers (rcvr) to the receiver 1354. Each of the receivers 1354 can be adjusted (eg, filtered, amplified) And the respective received signals of the hail conversion. The digitized signals are digitized to provide samples, and the samples are further processed to provide a corresponding "received" symbol stream. RX data processing 胄 〇 〇 can then receive and process ~ received symbol strings 1 & for a "detected" symbol stream based on a particular receiver processing technique. Then, the data processor 1360 can demodulate, deinterleave, and decode the symbol streams detected by each of the debts to recover the data stream. The processing of the data stream 136 can be performed with the transmitter system 131. ^11^〇23 201136215 Processor 1320 and TX data processor 1314 perform complementary processing. The processor 1370 can periodically decide which precoding matrix to use (discussed below). Processor 137A may also represent reverse link information including a matrix index portion and a rank value portion. The reverse link message may include various types of information regarding the communication link and/or the received data stream. The reverse link message can then be processed by data processor 1338, modulated by modulator 138, adjusted by transmitter 1354a to transmitter 1354r, and transmitted back to transmitter system 131, where TX data processor 1338 can also A plurality of data streams of the traffic data are received from the data source 1336. At transmitter system 1310, the modulated signal from receiver system 135A can be received by antenna 1324, adjusted by receiver 1322, demodulated by demodulator 134, and processed by RX data processor 1342 to extract the receiver. The reverse link message transmitted by system 1350. Processor 133 can then determine which precoding matrix to use to determine the beamforming weights and then process the extracted messages. The processor 1330 and the processor 137 can record with the stored data or instructions.

The memory is electronically communicated, for example, the processor 133A can be in electronic communication with the memory UK, and the processor 137 can be in electronic communication with the memory 1372. Figure 14 illustrates certain elements that may be included within the wireless device 14〇1. The wireless device 1401 may be the mobile device 1〇4 or the base station 1〇2. The wireless device 1401 includes a processor 14〇3. The processor 14〇3 may be a general-purpose single-chip or multi-chip microprocessor (for example, ARM), a dedicated micro-processor 24 201136215 (for example, a singularly-produced digital processor (DSP)), and a micro Controller, can be: array, etc. In a configuration, in addition to the processor 1403, the wireless subscriber 1401 may also include a separate DSP 142. The processor 14G3 may be referred to as a central processing unit (CPU). Although only a single processor 14〇3 is illustrated in the wireless (four) 1401 of Fig. 14, in an alternative configuration, a combination of processors (e.g., ARM and Dsp) may be used. The wireless device 1401 also includes a memory 14〇5. The memory 14〇5 can be any electronic component capable of storing electronic information. Memory 豸14〇5 can be embodied as random access memory (RAM), read-only memory (R〇M), disk storage media, optical storage media, flash memory devices in RAM, and included in the processor. On-board memory, EPROM t memory, EEPROM memory, scratchpad, etc., including combinations of the above.资料 Data 14〇7 and instruction 1409 can be stored in the memory 1405. The instructions 1409 can be executed by the processor 14〇3 to implement the methods disclosed herein. Execution command 1409 may involve the use of data 1407 stored in memory 1405. When the processor 14〇3 executes the instructions 14〇7, the various portions of the instructions 14〇7& can be loaded onto the processor 14〇3, and various materials 1409a can be loaded onto the processor 14〇3. The wireless device 1401 may also include a transmitter 1411 and a receiver i413 to enable transmission of signals to and from the wireless device 1401. Transmitter 1411 and receiver 1413 may be collectively referred to as transceiver 1415. The antenna ι417 can be electrically connected to the transceiver 1415. The wireless device 1401 can also include a plurality of transmitters, a plurality of receivers, a plurality of transceivers, and/or a plurality of antennas 1417a, 1417b. 25 201136215 The various elements of the wireless device 140 1 may be coupled together using one or more bus bars, which may include a power bus, a control signal bus, a status signal queue, a data bus, and the like. For the sake of simplicity, the various confluences are illustrated in Figure 14 as a busbar system 1419. The techniques described herein can be used in a variety of communication systems, including communication systems based on orthogonal multiplexing schemes. Examples of such communication systems include Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems. The OFDMA system uses orthogonal frequency division multiplexing (OFDM), which divides the overall system bandwidth into multiple orthogonal subcarriers. The secondary carriers may also be referred to as tones (t〇ne), frequency bands (Μη), and the like. With OFDM, each subcarrier and data can be individually modulated. SC-FDMA systems can use interleaved FDMA (ifdma) to transmit on subcarriers that are spread over the system bandwidth. Local FDMA (LFDMA) can be used to transmit on adjacent subcarrier blocks, using enhanced FDMA ( EFFiMA, ladies*...one, shot, or i block

Unless otherwise explicitly stated, 'the phrase "based on does not mean that only "base 26 201136215" is replaced by 5, the phrase "based on" also describes "based only on less based". The "processor" can be broadly understood to include a general purpose processor, a central processing unit (CPU), a microprocessor 'digital signal processor (朦), a controller, a microcontroller, a state machine, and the like. In some cases, "Processor J may represent a special application integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FpGA), etc. The term "processor" may refer to a combination of processing devices. For example, a group of Dsp and microprocessors, a plurality of microprocessors, or a plurality of microprocessors with a core of the core:, or any other such configuration. The term "memory" can be broadly understood to include any electronic component capable of storing electronic information. The term "memory" is used to represent various types of processor readable media, such as random access memory (r, read only memory (ROM), non-volatile random access memory (nvram), programmable Read-only memory (_), erasable programmable read-only memory (EPROM), electronically erasable PR〇M (EEpR〇M), flash memory, magnetic or optical data storage, scratchpad, etc. If the processor (4) reads information from the memory 'and/or writes information to the memory, the memory is said to be in electronic communication with the processor. The memory (4) integrated into the processor is in electronic communication with the processor. The terms "instruction" and "code" are used broadly to include any type of computer-readable statement. For example, the terms "instruction" and "code" may mean - or more than one program, routine, sub-routine, function, Programs, etc. "Instructions" and "Codes" may include a single computer readable statement or multiple computers. 27 201136215 Readable Statements" Hardware, software, orthography, or any combination thereof may be used to implement the foods described herein. b force to soft In fact, you can store the function as a computer-readable media - or multiple instructions. The term "computer readable media" or computer program product" means any computer-readable media available. Lu (not limited), computer readable media may include RAM, R〇M, EEp jobs, cd her or other CD storage media, disk storage media or other magnetic storage devices, or may be used to command or data The structure takes or stores the desired code and is accessed by the computer. (4) Other media. The disk and the compressed disk (CD), laser disc, CD, digital multi-function fifteen _VD) And Blu-ray® discs, where the disc is usually magnetic, and the disc uses lasers to optically reproduce the data. Axis = to transmit software or instructions from the transmission medium. For example, if you use the same:, fiber cable, twisted pair, digital subscriber line (job), or second-line, radio and microwave wireless technology from the website, word line, 峨, or such as "two electric slow, fiber optic regulations The twisted pair is included in the definition of the wireless technology package for transmitting dry media t radio and microwave. The method disclosed herein includes a specific step or (four) times of the protection of one or more of the steps of the method described above: the appropriate operation of the method of the description and/or the sequence of actions and / 丨T to modify specific steps and or use without departing from the scope of protection of the request. 28 201136215 In addition, it should be understood that the device can be obtained by downloading and/or otherwise obtaining modules and/or other suitable components for performing the methods and techniques described herein, such as those illustrated in Figures 4, 6, 8, and " Their methods and techniques. For example, the device can be surfaced to a server' to facilitate the transfer of components for performing the methods described herein. Alternatively, the various methods described herein may be provided via storage means (eg, random access memory (RAM), read only memory (R〇M), physical storage media such as compact discs (CDs) or floppy disks, etc.) Thus, after coupling to or providing the storage component to the device, the device can acquire various methods. Moreover, any other suitable technique may be employed to provide the methods and techniques described herein to a device. It should be understood that the claim is not limited to the precise configuration and elements described above. Various modifications, changes and variations are made in the arrangement, operation and details of the systems, methods and devices described herein without departing from the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a wireless communication system having a plurality of wireless devices; FIG. 2 is a block diagram illustrating a user device for use in the present system and method; FIG. 3 is a diagram illustrating traffic guidance frequency ratio estimation. Figure 4 is a flow chart illustrating a method of determining a traffic steering frequency ratio (TpR) of a received signal; Figure 5 illustrates a means function block corresponding to the method of Figure 4; Figure 6 is a graphical representation Flowchart of a method of traffic energy estimation; FIG. 7 illustrates a means function block corresponding to the method of FIG. 6; 29 201136215 FIG. 8 is a flow chart illustrating another method of determining traffic energy estimation; FIG. FIG. 1 is a block diagram illustrating pilot frequency energy estimation; FIG. 11 is a flow chart illustrating another method of pilot frequency energy estimation; FIG. 12 is a diagram corresponding to FIG. Means of the method blocks; Figure 13 is a block diagram of a transmitter system and a receiver system in a system; and Figure 14 illustrates certain elements included in a wireless device configured in accordance with the present invention. [Main component symbol description] 100 Wireless communication system 102 Base station 104 Mobile device 106 Uplink (UL) 108 Downlink (DL) 110 Traffic pilot frequency ratio (TPR) estimation module 204 UE 210 Traffic pilot frequency ratio Estimation module 212 PDSCH to RS EPRE ratio 216 Reference signal (RS) 218 Receive signal 220 Estimated channel matrix 222 Traffic pilot frequency ratio estimate 30 201136215 3 10 Traffic pilot frequency ratio estimation module 318 Receive signal 324 Channel matrix 326 De-spacer 3 2 8 De-spaced received signal 330 De-spaced estimated channel matrix / effective channel matrix 332 Whiteder 334 Pre-whitened de-spaced received signal 336 pre-whitened de-spaced channel matrix / pre-whitened Effective Channel Matrix 338 Traffic Energy Estimator 340 Pilot Energy Estimator 342 Traffic Energy Estimation 344 Pilot Frequency Energy Estimation / Pilot Frequency Energy 346 Traffic Pilot Frequency Ratio (TPR) Calculator 348 Traffic Pilot Frequency Ratio / Traffic Guidance Frequency Ratio Estimation 400 Method 402 Block 404 Block 406 Block • 408 Block 410 Block 412 Block 414 Block 31 201136215 500 Means Function Block 502 means function block 504 means function block 506 means function block 508 means function block 510 means function block 512 means function block 514 means function block 600 method 602 block 604 block 606 block 700 means function block 702 means function block 704 means function block 706 Means function block 800 method 802 block 804 block 806 block 808 block 810 block 812 block 900 means function block 32 201136215 902 means function block 904 means function block 906 means function block 908 means function block 910 means function block 912 means function block 1000 boot frequency Energy Estimation 1024 Channel Matrix 1030 Despaced Channel Matrix 1036 Pre-whitened De-spaced Channel Matrix 1044 Pilot Energy Estimation 1050 Precoding Matrix 1052 Whitening Matrix 1054 Block 1100 Method 1102 Block 1104 Block 1106 Block 1108 Block 1110 Block 1200 Means Function block 1202 means function block 1204 means function block 1206 means function block 33 201136215 1208 means function block 1210 means function Block 1300 ΜΙΜΟ System 1310 Transmitter System 1312 Data Source 1314 Transmit (ΤΧ) Data Processor 1320 ΜΙΜΟ ΜΙΜΟ Processor 1322a Transmitter 1322t Transmitter 1324a Antenna 1324t Antenna 1330 Processor 1332 Memory 1336 Source 1338 ΤΧ Data Processor 1340 Solution Tuner 1342 RX Data Processor 1350 Receiver System 1352a Antenna 1352r Antenna 1354a Receiver 1354r Receiver 1360 RX Data Processor 1370 Processor 34 201136215 1372 Memory 1380 Modulator 1401 Wireless Device 1403 Processor 1405 Memory 1407 Data 1407a Instruction 1409 command 1409a data 1411 transmitter 1413 receiver 1415 transceiver 1417a antenna 1417b antenna 1419 bus system 1421

DSP

Claims (1)

201136215 VII. Patent Application Range: 1. A method for estimating a traffic steering frequency ratio (TPR) of a received signal, the method comprising the steps of: de-spatializing the received signal to obtain a de-spaced reception Signaling; de-spatializing a channel matrix to obtain a de-spaced channel matrix; whitening the de-spaced received signal to obtain a pre-whitened de-spaced received signal; The channel matrix is whitened to obtain a pre-whitened de-spaced channel matrix; and the pre-whitened de-spaced received signal and one or more pre-whitened de-spaced channel estimation coefficients are used to determine an estimate of the received signal The method of claim 1, wherein the step of determining the estimated TPR of the received signal comprises the steps of: estimating a traffic energy of the pre-whitened de-spaced received signal; estimating the pre-whitened De-scaling the pilot frequency energy of the channel matrix; and using the estimated traffic energy and the estimated pilot energy to determine the estimate TPR. 3. The method of claim 2, wherein the step of estimating the traffic energy comprises the steps of: 36 201136215: determining a total received energy; determining a noise component of the total received energy; and utilizing the total received energy and the The noise component in the total received energy determines a traffic energy estimate. 4. The method of claim 3, wherein the step of determining a traffic energy estimate is performed for each subframe. 5. The method of claim 2, wherein the step of estimating the traffic energy comprises the steps of: decoding a physical downlink control channel (PDCCH); determining a resource block (RB) allocation; establishing a traffic energy estimate. a task; reading selected symbols from a tone random access memory (RAM); processing the selected symbols with an whiteder to obtain pre-whitened symbols; and estimating by using the pre-whitened symbols The traffic energy. 6. The method of claim 2, wherein the step of estimating the pilot energy comprises the steps of: multiplying the channel matrix by a precoding matrix to obtain a de-spaced channel matrix; multiplying the de-spaced channel matrix A whitening matrix is used to obtain a pre-whitening channel matrix of pre-whitening 37 201136215; and the bowing pilot energy is estimated by using the pre-whitening de-spaced channel moment. The step of pilot energy estimation. The method of claim 6, wherein the method of determining a reference to each sub-frame is performed, wherein the step of estimating the pilot energy comprises the steps of: ... abounding to a physical downlink control channel (PDCCH) Decoding. Determine the precoding matrix; establish a task of pilot frequency energy estimation; multiply the channel matrix of an estimated leaf by the pre-compilation, to produce a valid channel matrix with whitening moment pre-whitening And using the pre-whitened effective channel matrix to estimate the pilot frequency energy. 9. As requested by item 1 > , + ^ . matrix. The method, wherein the channel matrix is an estimated channel 10. The method of claim method method, wherein the actuating device is performed using a mobile device. The method is configured to be in a multiple input.夕轮出(ΜΙΜΟ) τ丄\ V ΙΜΟ) Positive parent frequency division multiplexing (〇FDM) work. 38 201136215 12. A wireless device configured to estimate a traffic steering frequency ratio (TPR) of a received signal, the wireless device comprising: a processor; a memory for electronic communication with the processor; The instructions in the suffix, the instructions being executable by the processor to: de-spatialize the received signal to obtain a de-spaced received signal; de-spatializing a channel matrix to obtain a De-spatialized channel matrix; whitening the de-spaced received signal to obtain a pre-whitened de-spaced received signal; whitening the de-spaced channel matrix to obtain a pre-whitened de-spaced a channel matrix; and using the pre-whitened de-spaced received signal and one or more pre-whitened de-spaced channel estimation coefficients to determine an estimated TPR of the received signal. 13. The wireless device of claim 12, wherein the estimated TPR of the received signal comprises: estimating a traffic energy of the pre-whitened de-spaced received signal; estimating the guidance of the pre-whitened de-spaced channel matrix Frequency energy; and using the estimated traffic energy and the estimated pilot energy to determine the estimated TPR. 14. The wireless device of claim 13 wherein the estimated traffic energy comprises: determining a total received energy; determining a noise component of the total received energy; and utilizing the total received energy and the total received energy The noise component determines a traffic energy estimate. 15. The wireless device of claim 14, wherein the determining a traffic energy estimate is performed for each subframe. 16. The wireless device of claim 13, wherein the estimated traffic energy comprises: decoding a physical downlink control channel (PDCCH); determining a resource block (RB) allocation; establishing a task of traffic energy estimation; Reading selected symbols from a tone random access memory (RAM); processing the selected symbols with an whiteder to obtain pre-whitened symbols; and estimating the traffic using the pre-whitened symbols energy. 17. The wireless device of claim 13, wherein estimating the pilot frequency energy comprises: multiplying the channel matrix by a precoding matrix to obtain a de-spaced channel matrix; multiplying the de-spaced channel matrix by a whitening The matrix is used to obtain a pre-whitening 201136215 de-spaced channel matrix; and the pre-whitening de-spaced channel matrix is used to determine - the 丨7丨 axe can be estimated. I8. The wireless device of claim 17, wherein the determining a pilot frequency energy estimate is performed for each subframe. 19. The wireless device of claim 13, wherein estimating the pilot frequency energy comprises: decoding a physical downlink control channel (PDCCH); determining a precoding matrix; establishing a task of pilot energy estimation; The estimated channel matrix is multiplied by the precoding matrix and multiplied by a whitening moment J 'female' to produce a pre-whitened effective channel matrix; and the pre-whitened effective channel matrix is used to estimate the pilot frequency energy. 2. The wireless device of claim 12, wherein the channel matrix is an estimated channel matrix. 21. The wireless device of claim 12, wherein the wireless device is a mobile device. 2. The wireless device of claim 21, wherein the mobile device is configured to operate in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) system. 41 201136215 23 - A wireless device configured to estimate a traffic steering frequency ratio (TPR) of a received signal, the wireless device comprising: for de-spatializing the received signal to obtain a de-spaced a component for receiving a signal; a component for de-spatializing a channel matrix to obtain a de-spaced channel matrix; for whitening the de-spaced received signal to obtain a pre-whitened de-spaced received signal Means for whitening the de-spaced channel matrix to obtain a pre-whitened de-spaced channel matrix; and for de-spatializing the received signal and one or more pre-whitening using the pre-whitening De-spatializing the channel estimation coefficients to determine an estimate of the TPR of the received signal. 24. A computer program product for estimating a received traffic frequency ratio (TPR) of a received message t. The computer program product comprises a computer readable medium having instructions thereon, the instructions comprising: De-spatializing the received signal, .a | j π u is a code for de-spatialized received signal; code for de-spatializing a channel matrix ϋ Μ to a spatialized channel matrix a code for whitening the de-spaced received signal to obtain a pre-whitened de-spaced received signal; 42 201136215 for de-empty of the pair for the white T-counter TPR the de-spaced channel The matrix is whitened to obtain a code for the channel matrix; and the pre-whitened de-spaced received signal and one or de-spaced channel estimate coefficients are used to determine the code of the received signal. Pre-whitening multiple pre-assessments 43